#define _CRT_SECURE_NO_WARNINGS
#include<stdio.h>
int main()
{
	char s[4][20] = { "AAAAA","BBBBB","CCCCC","DDDDD" };
	for (int i = 0; i < 4; i++)
	{
		s[i][i + 1] = 0;
	}
	for (int i = 0; i < 4; i++)
	{
		printf("%s", s[i]);
	}
	return 0;
}